1. Peyton Manning to Denver

All throughout last season, as the Indianapolis Colts continued to falter without Peyton Manning, NFL fans questioned what they would do if they "earned" the No. 1 draft pick.

Do they stick with Peyton, move forward with Andrew Luck, or somehow tie down both of them?

Well, as we now know the Colts chose Luck and dumped the former face of their franchise (and one of the faces of the NFL), which sparked the "Where will Peyton go?" conversation.

In the end, it was the Denver Broncos who won the Manning sweepstakes and added one of the most prolific passers of all-time to the league's top rush offense from last season.

Of course, the loss of Tim Tebow's rushing abilities at the quarterback position will slightly hamper the Bronco rushing attack, but the addition of Manning should result in an a more balanced offensive attack which Denver lacked last year.

2. Mario Williams to Buffalo

After a solid start in which the Buffalo Bills were looking like a serious contender, they fell flat on their face, losing eight of their last nine games.

In those eight losses, their opponents averaged more than 40 points per game—an obvious sign that the Bills defense was in need of some help.

In one of the biggest free agency pickups of this offseason, Buffalo found that help in the former first overall draft pick, Mario Williams.

It was clear that the front office in Buffalo made it a point to bolster that defense, also picking up defensive end Mark Anderson in free agency and using its first round draft pick on the stellar South Carolina cornerback, Stephon GIlmore.

These additions may be enough to turn the Bills' defense from a weakness to a strength in 2012.

4. Curtis Lofton to New Orleans

Swiping linebacker Curtis Lofton from their division rival Atlanta Falcons has been about the only good thing to happen to the New Orleans Saints this offseason.

In fact, I can't think of a single team having a worse offseason than that of the Saints well, ever.

The bounty debacle has left the Saints without their general manager Mickey Loomis, head coach Sean Payton, defensive captain Jonathan Vilma and others, and now, their star quarterback, Drew Brees is still yet to sign his franchise tag and may sit out the entire season, as well.

The signing of Lofton (along with defensive tackle Brodrick Bunkley) wasn't just a good move—it was an absolute need if the Saints plan to return to the playoffs.

5. San Francisco's Investment in Alex Smith

It took some time, grooming, and in the end, the right head coach, but Alex Smith finally solidified himself as a quarterback who can win games.

Smith's newfound confidence led him to pass for more than 3,000 yards last season, but the offense was still centered around Pro Bowl running back Frank Gore.

I wouldn't expect that to change much, but now, Smith has even more tools around him which should make the 49er offense more balanced.

San Francisco resigned wide receiver Ted Ginn and added another weapon on the outside, Mario Manningham, to complement Michael Crabtree and Vernon Davis.

The 49ers were even able to add some depth behind Gore with the addition of Brandon Jacobs, which should help increase the longevity of Gore, a runner who has been hampered by injuries in the past.

Let's not forget the addition of a 14-year veteran receiver in Randy Moss. While receiver is one position where increasing age is not a good thing, the signing of Moss could prove beneficial over the course of the year.